Polishing-head.



Patented Nov. 22, 1910.

EcZronZPoZZard yin/@7150 E. T. IPOLLARD.

POLISHING HEAD.

APPLIOATION I'ILED JULY 29. 1910.

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EDSON T. POLLARD, OIE RUTLAND, VERMONT.

POLISHING-HEAD.

Specification of Letters Patent.

Patented Nov. 22, 1910.

Application filed July 29, 1910. Serial No. 574,504.

To all whom it may concern:

Be it known that I, Enson T. PoLLARn, a citizen of the United States,residing at Rutland, county of Rutland, State of Vermont, have inventedcertain new and useful Improvements in Polishin -Heads, of which thefollowing is a specification, reference being had therein to theaccompanying drawing.

This invention relates to a polishing head and particularly to aconstruction of. the members of said head and their mounting foruniversal movement.

- The invention has for an object to provide a novel and improvedconstruction of polishing head provided with leaders disposedtangentially to the center of said head and provided with scrolls at itsperiphery to lead the abrading material toward the liquid feed at thecenter of the head.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawingFigure 1 is a bottom plan of the polishing head; Fig. 2 isa vertical section on line 22 of Fig. 1; Fig. 3 is a horizontal sectionon line 3-3 of Fig. 2; and Fig. 4 is a section on line 44 thereof.

Like numerals of reference refer to like parts in the several figures ofthe drawing. In the drawing presented, the polishing head or disk 10 isprovided with a series of leaders or scrapers 11 adapted to bear uponthe material to be polished. As shown in Fig. 1, these leaders 11 areprovided with a point 12 at their free outer ends and at their' innerends communicate with a series of separate angular blocks 16 disposed incommunication with the inner. ends 14 of the leaders 11. These blocksbeing disposed at an angle to each pockets 15 adapted to retain theabrasive material after it has been successively fed about the head 10.The members extend ng from the leaders 11 are continued ina splralcourse by a series of blocks or members 16 forming pockets 15intermediate thereof and adapted to retard the flow of abraslve materialtoward or from the central opening 17 of the disk or head. The finalmember 18 of the series of contacting members 16 is spaced from membersof its own series and from the surrounding series to provide a spacethrough which the abrasive material,

other, form a series of ing and reaching this point, can travel to thenext adjacent scroll through the centrifugal force and then continue itsgrinding action. In the assemblage of the parts of the head, it isdesirable to cast the head plate 10 upon the wrought iron or steelgrinding leaders which forms a convenient and economical means forassembling the parts.

The head is supported by a tubular coupling 20 provided at its lowerends with pins 21 adapted to seat and travel in bayonet slots 22 formedin the central projection of the head at 23. Within this socket, acoupling member 24 extends which is provided with a passage 25 throughwhich liq uid may be introduced to and through the headby means of thenozzle26. The member 24 has a tap 29 for a set screw for attachment tothe usual driving spindle or shaft and is pivotally mounted upon thesocket by means of a bolt 27 extending through these parts so as topermit a limited pivotal movement upon the head and yet maintain aconstant liquidcommunication with the center of the head. The outerleader 11 of this head may, if desired, be tapered toward its point, asshown at 28 1n Fig. 2.

In the operation of the invention, the

abrasive material isfed inward from the periphery of the head by meansof the lead-' ers and then encounters the centrifugal force of the head,and also liquid, if used, which is forced outward from. the centerthereof. In the continued movement of these scrolls, the centrifugalforce is overcome and the abrasive material is fed inward at an angle tothe polishing members upon the head so as tobe-received by the pocketsthereof and, in its inward movement, retained to complete a perfectedpolishing action. The construction permits the scraper members to have across-cutting action upon the material which increases their effectiveness in connection with the abrasive material fed. The construction alsokeeps the abrasive material and water in active circulation while thefeature of acontinuous curve in the leaders, formed of members," set atan angle to each other, breaks up the flow in that direction undercentrifugal force. The bending of these leads which are relativelysh0rt, can be effected by a single heatthe remainder of the scroll isformed of short rectangular wrought iron pieces secured to the head bycasting therein or trio scrolls,

'ber of each series ber permits the material caught thereby to bedelivered to the trifugal force and ing action.

' The invention and next outer scroll by centhus continue thegrindpresents a simple, eflicient economical construction of polishinghead adapted for application to any machine for that purpose.

Having described m forth its merits what I claim and desire to secure byLetters Patent is- 1 In a polishing head, a leader and a feeding portionhavinga series of pockets upon its peri hery. 1

v2. In a po ishing head, a leader and a feeding portion having a seriesof pockets upon its periphery, the final member of said leader belngseparated therefrom.

3. In a polishing head, a series of conceneachformed of a curved leader,and a series of feeding members having retalilning pockets disposed atan angle to each ot er.

polishing head, a series of concentric scrolls, each formed of a curvedleader,

and a series of feeding members disposed at an angle to each other, thefinal central membeing separated from the remaining members of thescroll.

5. In a polishing head, a curved leader having an angularly disposedinner end, and a series of feeding members extending from said end anddisposed at an angle to each other.

6. In a polishing'head, aseries of curved leaders disposed concentric toeach other,

- and a feeding portion composed of separate members disposed at anangle to each other to form a series of pockets upon the outer face ofsaid leaders.

7. In a polishing head, a series of curved leaders dis osed concentricto each other,

and a fee ing portion composed of-sepainvention and set rate membersdisposed at an angle to each other to form a series of pockets upon theouter face of said leaders, the ,final member.

of said series being spaced from the final member of the scroll toprovide a passage into the next adjacent scroll.

a polishing head, a curved leader having at its inner end a series offeeding members disposed at an angle to each other and its outer endtapered both laterally and longitudinall v 9. In a po ishing head, ahead plate, a series of concentric scrolls secured thereto,

the outer ends of said scrolls at the pe-- riphery of said head beingprovided with a tapering'free end, an angular portion at the opposite offeeding members in contact with said end and disposed at an angle toeach other.

10. In a polishing head, a series of tangentially disposed leaders,feeding members disposed at an angle to each other and disposed at theinner end of said leaders, a head cast upon said leaders, and a feedingconnection disposed at the center of said head.

11. In a polishing head, a series of' concentric scrolls, each formed ofa curved leader, a series of angularly disposed blocks at the innerendof each leader, and means for feeding liquid at the center of said head.

"12. In a polishing head, a series of concentric scrolls, each formed ofa curved leader, a series of angularly disposed blocks at the inner endof each leader, means for feeding liquid at the center of said head, asocket pivotally mounted upon said head t the center thereof, and anozzle pivoted upon said socket to discharge therein.

In testimony whereof I aflix my signature of two witnesses.

in presence EDSON T. POLLARD.

Witnesses:

GEO. C. COBB, WM. J. MCGARRY.

end of said scrolls, and a series

